body {
    font-family: 'Arial', sans-serif;
    /* background-image: url(../背景1.jpg); */
    background-color: #0d031e;
    background-attachment: fixed;
    background-size: cover;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* header头部 */
.header {
    width: 100%;
    font-weight: 600;
    font-size: 1.25vw;
    letter-spacing: .15vw;
}

#navbar {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    width: 100%;
    z-index: 999;
}

.header .wrapper {
    display: flex;
}

.logo {
    width: 16.5vw;
    margin-right: 2vw;
}

.nav-wrapper {
    min-height: 0vw;
    padding: 1.6vw 0;
    position: relative;
}

.nav-wrapper .nav-container {
    align-items: center;
    max-width: 92vw;
    margin: 0 auto;
    flex-direction: row;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #fff;
    position: relative;
}


.nav-wrapper .nav-container .nav-l {
    align-items: center;
    display: flex;
}

.nav-wrapper .nav-container .nav-r {
    display: flex;
    box-sizing: border-box;
}

.nav-wrapper .nav-container .nav-r img {
    width: 10%;
    margin-right: 1vw;
}

.b-l {
    width: 10vw;
    text-align: center;
    border-radius: 1.2vw;
    margin: auto;
    margin-right: 1.5vw;
    transition: width .25s;
}

.b-l:hover {
    background-color: #192248;
    padding: 1.3vw 0;
}

.nav-wrapper .nav-container button {
    background-color: #192248;
    color: #fff;
    font-size: 1.25vw;
    width: 100%;
    height: 4.8vw;
    border: 0;
    line-height: 1;
    border-radius: 5vw;
    font-weight: 600;
    margin-right: 2.2vw;
    letter-spacing: .125vw;
    text-transform: uppercase;
    cursor: pointer;
    box-sizing: content-box;
    display: inline-block;
}


.nav-wrapper .nav-container .nav-a {
    display: flex;
}

.nav-wrapper .nav-container .nav-a li {
    padding-right: 3vw;
    list-style: none;
}

.nav-wrapper li a {
    color: #fff;
    text-decoration: none;
}

.nav-wrapper li a:hover{
    color: #253a9c; 
}

.container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin: 2vw;
}

.image {
    width: 40%;
    max-width: 30vw;
    margin-left: 6vw;
    margin-right: 3vw;
    margin-top: 6vw;

}

.description {
    width: 70%;
}

.description h1 {
    margin-top: 12vw;
    color: aliceblue;
    font-size: 300%;
    margin-bottom: 0em;
}

.description h3 {
    margin-top: 0;
    color: aliceblue;
}

.description h4 {
    margin-top: 0.6vw;
    color: rgb(178, 203, 224);
    font-size: 120%;
    margin-right: 6vw;
}

@media (max-width: 36vw) {
    .container {
        flex-direction: column;
    }

    .image {
        margin-right: 0;
        margin-bottom: 1.2vw;
    }

    .description {
        width: 100%;
    }
}